ASTM A789 UNS S32001 Lean Duplex Stainless Steel Tubes
ASTM A789 UNS S32001 Lean Duplex Stainless Steel Tubes are engineered for cost-effective corrosion resistance and superior mechanical strength compared to standard austenitic stainless steels. UNS S32001 offers a balanced duplex microstructure with enhanced resistance to chloride-induced corrosion, stress corrosion cracking, and pitting. With higher strength and optimized alloy content, it serves as an economical alternative to grades like 304L and 316L in many industrial applications.
These tubes are widely used in structural components, chemical processing, water treatment systems, and fuel-handling equipment requiring strength, durability, and excellent corrosion performance.
Key Features
- Higher strength than 304L/316L stainless steel
- Excellent resistance to pitting and crevice corrosion
- Improved chloride stress corrosion cracking resistance
- Cost-effective lean duplex alloy with reduced nickel content
- Durable performance in aggressive and moderately corrosive environments
- Suitable for medium-pressure and load-bearing applications
Equivalent Grade
| Standard |
Grade |
| UNS |
S32001 |
| EN / DIN |
1.4482 |
| ASTM |
Lean Duplex Alloy |
| Chinese Grade |
2101 |
ASTM A789 UNS S32001 Chemical Composition
| Element |
Percentage (%) |
| Chromium (Cr) |
20.0 – 22.0 |
| Nickel (Ni) |
1.0 – 4.0 |
| Manganese (Mn) |
4.0 – 6.0 |
| Molybdenum (Mo) |
≤ 0.8 |
| Silicon (Si) |
≤ 1.0 |
| Nitrogen (N) |
0.10 – 0.25 |
| Carbon (C) |
≤ 0.03 |
| Phosphorus (P) |
≤ 0.04 |
| Sulfur (S) |
≤ 0.02 |
| Iron (Fe) |
Balance |
UNS S32001 Mechanical Properties
| Property |
Value |
| Tensile Strength |
≥ 620 MPa |
| Yield Strength |
≥ 450 MPa |
| Elongation |
≥ 25% |
| Hardness |
≤ 290 HB |
UNS S32001 Physical Properties
| Property |
Value |
| Density |
7.75 g/cm³ |
| Thermal Conductivity |
18 W/m·K |
| Electrical Resistivity |
0.70 µΩ·m |
| Modulus of Elasticity |
200 GPa |
| Melting Range |
1390 – 1450°C |
Type of UNS S32001 Tubes
- Seamless Lean Duplex Tubes
- Welded Lean Duplex Tubes
- ERW Tubes
- EFW Tubes
- Heat Exchanger Tubes
- Instrumentation Tubes
- Hydraulic Tubes
Application
- Structural and construction projects
- Chemical and petrochemical processing
- Desalination systems
- Water treatment plants
- Marine and offshore equipment
- Heat exchangers and condensers
- Fuel and gas distribution pipelines
- Pulp & paper industry
- Pressure vessels and industrial piping
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